<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>
<style>
*{
	text-align:center;
vertical-align:middle;
margin:0;
padding:0;
	}
#d1{
background-color:#399;
width:100px;
height:100px;
margin-bottom:10px;
padding:20px;
border: 3px solid blue;
	}
#d2{
background-color:#D8BFD8;
width:100px;
height:100px;
padding:20px;
border:10px dotted gray;
	}
</style>
</head>
<body>
	<div id="d1">盒子模型</div>
    <div id="d2">盒子模型2</div>
</body>
</html>